Initial commit

vendor/github.com/briandowns/openweathermap/current_group.go

@@ -0,0 +1,98 @@
+package openweathermap
+
+import (
+	"encoding/json"
+	"fmt"
+	"net/http"
+	"strconv"
+	"strings"
+)
+
+// maximum count of several identifiers
+// used in CurrentByIDs
+const maxCityIDs = 20
+
+// CurrentWeatherGroup struct contains list of the CurrentWeatherData
+// structs for JSON to be unmarshaled into.
+type CurrentWeatherGroup struct {
+	Count int                   `json:"count"`
+	List  []*CurrentWeatherData `json:"list,omitempty"`
+
+	Unit string
+	Lang string
+	Key  string
+
+	*Settings
+}
+
+// NewCurrentGroup returns a new CurrentWeatherGroup pointer with the supplied parameters
+func NewCurrentGroup(unit, lang, key string, options ...Option) (*CurrentWeatherGroup, error) {
+	unitChoice := strings.ToUpper(unit)
+	langChoice := strings.ToUpper(lang)
+
+	g := &CurrentWeatherGroup{
+		Settings: NewSettings(),
+	}
+
+	if ValidDataUnit(unitChoice) {
+		g.Unit = DataUnits[unitChoice]
+	} else {
+		return nil, errUnitUnavailable
+	}
+
+	if ValidLangCode(langChoice) {
+		g.Lang = langChoice
+	} else {
+		return nil, errLangUnavailable
+	}
+	var err error
+	g.Key, err = setKey(key)
+	if err != nil {
+		return nil, err
+	}
+
+	if err := setOptions(g.Settings, options); err != nil {
+		return nil, err
+	}
+	return g, nil
+}
+
+// CurrentByIDs will provide the current weather as a list
+// by the specified location identifiers
+func (g *CurrentWeatherGroup) CurrentByIDs(ids ...int) error {
+	n := len(ids)
+	if n > maxCityIDs {
+		return errCountOfCityIDs
+	}
+
+	strIDs := make([]string, n)
+	for i, id := range ids {
+		strIDs[i] = strconv.Itoa(id)
+	}
+
+	id := strings.Join(strIDs, ",")
+	uri := fmt.Sprintf(groupURL, "appid=%s&id=%s&units=%s&lang=%s")
+
+	response, err := g.client.Get(fmt.Sprintf(uri, g.Key, id, g.Unit, g.Lang))
+	if err != nil {
+		return err
+	}
+	defer response.Body.Close()
+
+	if response.StatusCode == http.StatusUnauthorized {
+		return errInvalidKey
+	}
+
+	if err = json.NewDecoder(response.Body).Decode(&g); err != nil {
+		return err
+	}
+
+	for _, w := range g.List {
+		w.Settings = g.Settings
+		w.Unit = g.Unit
+		w.Lang = g.Lang
+		w.Key = g.Key
+	}
+
+	return nil
+}